In the other bombing, a blast hit the al-Shaab district, killing at least four people and injuring 16. As of Monday, no group had claimed responsibility.

These attacks follow the liberation of Fallujah, a former ISIS stronghold, by the Iraqi military. Officials have tied the recent surge in ISIS' attacks to the series of losses the terrorist group has seen in Iraq over the past 12 months.

The bombings hit the city during the last few days of the Muslim holy month of Ramadan. The Karrada district is a popular place for observant Muslims to gather before and after fasting.

This Ramadan, ISIS has claimed responsibility for several attacks — especially in Muslim-majority countries. An attack in Bangladesh last week killed 22 people.